Beyond nostalgia for “the good old days”, I think there is something to be said for hardware controls. Having a physical slide switch or dial that sets the mode could offer a lot of advantages. You’d have an easy way to know and control the mode both before and after you turn on your light. You wouldn’t have to feed an electronic switch. For people who enjoy stuff like automatic watches and “steampunk”, the analog flair would be especially nice on brass models.
I’d love to see something like that with a nice, warm, high-CRI LED from Yuji or Nichia…